Granted Patent
Utility
US 5,218,962 · App. 07/685,414
Multiple region pulse oximetry probe and oximeter
Inventors:
Paul D. Mannheimer, D. Christopher Chung, Carl Ritson
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Apr 15, 1991
Inventors
Paul D. Mannheimer
D. Christopher Chung
Carl Ritson
Assignee (at issue)
Nellcor Incorporated
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.